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Viewing changes to Epsilon/epsilon/pending.py

  • Committer: Jean-Paul Calderone
  • Date: 2014-06-29 20:33:04 UTC
  • mfrom: (2749.1.1 remove-epsilon-1325289)
  • Revision ID: exarkun@twistedmatrix.com-20140629203304-gdkmbwl1suei4m97
merge lp:~exarkun/divmod.org/remove-epsilon-1325289

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Epsilon/epsilon/pending.py
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from twisted.internet.defer import Deferred
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from twisted.python.failure import Failure
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class PendingEvent(object):
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    def __init__(self):
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        self.listeners = []
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    def deferred(self):
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        d = Deferred()
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        self.listeners.append(d)
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        return d
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    def callback(self, result):
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        l = self.listeners
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        self.listeners = []
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        for d in l:
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            d.callback(result)
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    def errback(self, result=None):
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        if result is None:
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            result = Failure()
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        l = self.listeners
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        self.listeners = []
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        for d in l:
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            d.errback(result)